What it means
Liquidity means how easily a business can turn what it owns into cash to pay what it owes. The current ratio compares all current assets with current liabilities, but it includes inventory, which may be slow to sell or worth less than its book value.
The acid test strips inventory out to give a stricter view. The test counts cash, short-term investments that can be sold quickly and accounts receivable.
These are the assets most likely to turn into cash within weeks. The total is divided by current liabilities, which are the debts due within a year.
A ratio of 1.0 means the company has exactly one dollar of quick assets for each dollar of short-term debt. Above 1 is generally comfortable, while a figure well below 1 suggests that the company might struggle to pay bills without selling stock or borrowing.
The right level, however, varies by industry. A supermarket may have a low acid test result because it sells stock quickly and collects cash at the till, so it needs less liquidity.
A construction firm with long payment cycles typically needs a higher ratio. Comparing with industry peers and the company's own history gives the number meaning.
The ratio has limits. Receivables may not all be collectable, and a high ratio can also mean the company is holding too much idle cash.
Some analysts use a simpler version that subtracts inventory and prepaid expenses from current assets, which can give a slightly different answer. The acid test is best used with other liquidity measures, not on its own.
The current ratio, the cash ratio and the cash conversion cycle each add a different angle, and together they show whether a business is truly comfortable or merely looks it. Lenders often set covenants (loan conditions) on one or more of these ratios, so managers keep a close eye on them.
In practice
Real-world examples
Example 1
A bank manager reviews a manufacturing company's loan application. The current ratio looks strong at 2.2, but most of the assets are unsold stock. The acid test is only 0.6, so the manager asks for more security or a lower loan amount.
Example 2
A software company has almost no inventory, so its acid test ratio and current ratio are nearly identical at 2.4. The CFO uses the ratio to show investors that the company can easily cover its short-term obligations without relying on a stock sale.
Example 3
A fashion retailer approaches a seasonal peak with large stock purchases financed by supplier credit. Its acid test falls to 0.4 in the autumn. The finance team arranges a short-term credit line before the invoices fall due, so there is no scramble for cash in the busy season.
Think of it
The acid test strips out inventory to show if you can pay bills with truly liquid assets.
Formula
Calculation
Acid test ratio = (Cash + Short-term investments + Accounts receivable) / Current liabilities
A company has $40,000 in cash, $20,000 in short-term investments, $90,000 in accounts receivable, $110,000 of inventory and $100,000 of current liabilities. Quick assets = $40,000 + $20,000 + $90,000 = $150,000. Acid test ratio = $150,000 / $100,000 = 1.5. The company has $1.50 of quick assets for every $1 of short-term debt.Case study
Seen in the real world
Crestline Furniture is a fictional manufacturer that, in this illustrative story, reported a current ratio of 2.0 and felt secure. Its current assets of $1,000,000 included $600,000 of finished furniture awaiting buyers, while current liabilities were $500,000.
When a supplier asked for faster payment, the owner realised that the quick assets were only $400,000, made up of cash and receivables. The acid test ratio was therefore $400,000 / $500,000 = 0.8, meaning the company could not pay all its bills without selling stock.
The owner ran a clearance sale to turn stock into cash and negotiated longer terms with two suppliers. Within three months the acid test rose above 1.0 and the company was no longer dependent on a quick stock sale to stay solvent. The owner now reviews the acid test every month alongside the current ratio.
Watch out
Common mistakes
- Including inventory in the calculation. The point of the test is to exclude stock that may not convert to cash quickly.
- Assuming a result below 1 always means distress. Businesses that collect cash fast and pay slowly can operate safely with a low figure.
- Counting doubtful receivables at full value. Debts that are unlikely to be collected should be excluded or reduced.
Questions
People also ask
Is the acid test the same as the quick ratio?
Yes, they are two names for the same measure. Some people also call it the liquid ratio.
What is a good acid test ratio?
A figure of 1.0 or above is often seen as comfortable, but it varies by industry. Compare with peers and watch the trend over time.
Why is it called the acid test?
The name comes from an old method of testing whether metal was real gold using acid. In finance it is a harsh test of whether the business can pay its bills.
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